Spannungsfeld Fahrzeugantriebe Gedenkschrift F R Prof Dr Ing Roland Baar

Prof. Dr.-Ing. Roland Baar, Head of the department of Powertrain Technologies at Technische Universität Berlin, unfortunately deceased on 23 June 2018. Professor Roland Baar rendered an outstanding service to the science of powertrain technologies, especially in the field of turbocharging. His enthusiasm and determination were both a professional and a personal inspiration to everyone who worked with him. To continue Roland Baar’s work, his business and academic colleagues dedicate this collection of scientific papers to his memory. The articles in this memorial publication cover different aspects of powertrain technology research. This topic plays an important part in the current public debate on climate protection, air pollution control and sustainability. The first articles of this book deal with the market situation and the general framework for research and development of powertrains. This lays the foundation for more technical topics. The following articles are concerned with the growing trend of powertrain electrification. They discuss the numeric modeling of alternative drivetrains and the energetic assessment of different powertrain concepts, such as hybrid drives and fuel cells. One of the central topics in this book is the combustion engine, which encompasses both the diesel and the gasoline engine. For instance, the injection of water into gasoline engines is covered extensively as a method to raise the thermodynamic efficiency. Furthermore, there are articles on innovative injection concepts for diesel engines as well as on the use of alternative, regenerative fuels for combustion engines. Many of the articles address the subject of turbocharging of combustion engines, which was a major research topic of Roland Baar. In the present book, a special focus is on the analysis of energy flows and the possibilities of a better modeling of charging units in numerical simulations. The last part of the book contains articles on novel aftertreatments of exhaust gases to reduce pollutant emissions as well as on experimental methods in this field. Am 23. Juni 2018 verstarb Prof. Dr.-Ing. Roland Baar, Leiter des Fachgebiets Fahrzeugantriebe der Technischen Universität Berlin. Roland Baar hat sich insbesondere auf dem Gebiet der Aufladung von Verbrennungsmotoren verdient gemacht und brachte darüber hinaus die Forschung rund um den Fahrzeugantrieb voran. Mit seiner Energie und seiner Entschlossenheit war er für alle, die mit ihm arbeiteten, sowohl fachlich als auch persönlich stets eine Inspiration. Um seine Arbeit fortzuführen, haben seine beruflichen und akademischen Weggefährtinnen und -gefährten ihm sowie seinen Forschungsthemen deshalb diesen Band gewidmet. In dieser Gedenkschrift sind Beiträge versammelt, die sich dem Forschungsfeld Fahrzeugantriebe widmen. Dieses Themengebiet steht auf Grund der aktuellen Fragestellungen hinsichtlich Klimaschonung, Luftreinhaltung und Nachhaltigkeit im Fokus der gesellschaftlichen Debatte. Darstellungen der Marktsituation und der sich daraus ableitenden Randbedingungen für die Erforschung und Entwicklung künftiger Fahrzeugantriebe bilden die Grundlage für die folgenden technischen Themen. Der zunehmende Trend der Elektrifizierung des Antriebsstrangs wird in verschiedenen Beiträgen behandelt. Hier werden die numerische Modellierung alternativer Antriebe sowie die energetische Bewertung verschiedener Antriebskonzepte wie etwa elektro-hybride Antriebe sowie Brennstoffzellenanwendungen diskutiert. Ein Schwerpunkt des Buches ist die diesel- und die ottomotorische Verbrennung. So wird beispielsweise die Wassereinspritzung für Ottomotoren zur Steigerung des thermodynamischen Wirkungsgrades ausführlich behandelt. Ebenso finden innovative Einspritzkonzepte für Dieselmotoren sowie der Einsatz alternativer, regenerativer Kraftstoffe für Verbrennungsmotoren Beachtung. Ein wesentlicher Anteil der Beiträge ist der Aufladung von Verbrennungsmotoren gewidmet – ein Kernthema der Arbeit von Roland Baar. Insbesondere das Verständnis der Energieströme sowie eine Möglichkeit einer verbesserten Modellierung des Aufladeaggregats für die numerische Simulation werden beleuchtet. Weitere Beiträge decken zusätzlich den Bereich neuartiger Abgasnachbehandlungssysteme zur Reduzierung der Schadstoffemissionen sowie experimentelle Methoden zur deren Untersuchung ab.

This book focuses on gasoline compression ignition (GCI) which offers the prospect of engines with high efficiency and low exhaust emissions at a lower cost. A GCI engine is a compression ignition (CI) engine which is run on gasoline-like fuels (even on low-octane gasoline), making it significantly easier to control particulates and NOx but with high efficiency. The state of the art development to make GCI combustion feasible on practical vehicles is highlighted, e.g., on overcoming problems on cold start, high-pressure rise rates at high loads, transients, and HC and CO emissions. This book will be a useful guide to those in academia and industry.

This monograph is based on methanol as a fuel for transportation sector, specifically for compression ignition (CI) engines. The contents present examples of utilization of methanol as a fuel for CI engines in different modes of transportation such as railroad, personal vehicles or heavy duty road transportation. The book also focuses on effect of methanol on combustion and performance characteristics of the engine. The effect of methanol on exhaust emission production, prediction and control is also discussed. It also discusses current methanol utilization and its potential, its effect on the engine in terms of efficiency, combustion, performance, pollutants formation and prediction. Part of the chapters are based on review of state-of-the-art while other chapters are dedicated to an original research. This volume will be a useful guide to professionals and academics involved in alternative fuels, compression ignition engines, and environmental research.

This monograph focuses on methanol and its utilization in transportation sector, namely in spark ignition (SI) engines. The contents focus on methanol production and presents a variety of production technologies from different feedstocks. The potential of methanol utilization in transportation in SI engines is discussed, its challenges, limitations, aspects related to its utilization and current global use of methanol are also presented. The book also contains chapters related to pollutant formation and exhaust emissions from methanol fuelled SI engines, one chapter is focused specifically on formaldehyde emissions, which possesses one of the greatest challenges of methanol use in IC engines. Readers will learn about the production aspects of methanol, its potential as a sustainable fuel, its utilization in SI engine and the effect of methanol and its utilization techniques on engine performance, combustion, exhaust emissions, efficiency and other important parameters. This volume will be a useful guide for professionals, post-graduate students involved in alternative fuels, spark ignition engines, and environmental research.

This monograph covers different aspects related to utilization of alternative fuels in internal combustion (IC) engines with a focus on biodiesel, dimethyl ether, alcohols, biogas, etc. The focal point of this book is to present engine combustion, performance and emission characteristics of IC engines fueled by these alternative fuels. A section of this book also covers the potential strategies of utilization of these alternative fuels in an energy efficient manner to reduce the harmful pollutants emitted from IC engines. It presents the comparative analysis of different alternative fuels in a variety of engines to show the appropriate alternative fuel for specific types of engines. This book will prove useful for both researchers as well as energy experts and policy makers.

The Tribology and Design Conference explores the role of technology and design in the broader sense. It brings together colleagues from different disciplines interested in problems of surface interaction and design. The applications covered range from geomechanics to nano problems and from sustainability issues to advanced materials. It has never been so important for the designer to consider product and system durability in relation to reliability and sustainability issues. The topics for discussion also cover studies of tribology in nature and how the resulting lessons can be applied by the designers. Another important theme is the application of tribology in biomechanics, a field in which surface mechanics in general is of fundamental importance. This book contains the papers presented at the Third International Conference, arranged into the following subject areas: Design Tools; Test Methods; Surface Engineering; Tribology under Extreme Conditions; Surface Measurements & Lubrication.